Seiko Cal. 3830 - 987

This Automatic model from 1974 features a 37mm Two-Tone case. Powered by the 3830 caliber with 36j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-8cb23910482e]

Also known as: Helmet, Bellmatic

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1974

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